docs: def patch(source, sink):
      """Create a direct link between a source and a sink.
  
      Implementation::
  
          sink = sink()
          for value in source():
              sink.send(value)
  
      .. |patch| replace:: :py:func:`patch`
      """
      sink = sink()
      for v in source():
          try:
              sink.send(v)
          except StopIteration:
              return